Lifting-jack.



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Nrrnn STATES PATENT JOHN THOMAS SANDERS, OF ANDREVS, TEXAS.

LIFTING-JACK.

SPECIFICATION forming part of Letters Patent No. 663,932, dated December18, 1900.

Application met caoba 4, 1900. serial No. 32,030. (No model.)

To ctZZ whom t may oon/cern,.-

Be it known that I, JOHN. THOMAS SAN- DERS, a citizen of theUnitedStates, residing at Andrews, in the county of Wood and State ofTexas, have invented a new and useful Lifting-J ack, of which thefollowing is a specication.

The invention relates to improvements in lifting-jacks.

The object of the present invention is to improve the construction oflifting-jacks and to provide a simple, inexpensive, and efficient deviceadapted to be readily applied to that class of lifting-jacks having avertically-movable screw and capable of enabling the jack to be readilyconnected with an object at the base of it, whereby the range of theliftingjack will be materially increased.

The invention consists in the construction and novel combination and'arrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure l is a perspective view of a lifting-jackconstructed in accord-` ance with this invention. sectional View of thesame.

Like numerals of reference designate corresponding parts in both iguresof the drawings.

l designates a horizontal bar arranged at the top of thevertically-movable screw 2 of a jack 3, provided at the top of the screwwith the usual head 4, having apertures for the reception of a bar orlever whereby the screw is rotated for operating the jack. Thehorizontal bar l, which rests upon the top of the head, is provided witha central aperture 5, receiving a vertical journal or pivot 6, formedintegral with the head of the screw and provided with a flange 7. Theflange 7, which is annular, extends horizontally from the upper end ofthe journal or pivot 6 and projects over the upper face of thehorizontal bar to retain the latter in position. The horizontal bar,which is designed to be constructed of steel or other suitable material,projects from opposite sides of the jack and is provided at its endswith vertical perforations for the Shanks of eyebolts S, which connecthooks or grapples 9 with the ends of the bar 1. The eyebolts, which areadapted to Fig. 2V is a vertical turn freelyin the openings at the endsof the horizontal supporting-bar, may be swiveled to the same in anysuitable manner; but in the accompanying drawings they areshown threadedand provided with nuts l0, whereby the hooks may be readily detachedfrom the supporting-bar when desired. The hooks are provided at theupper ends of the sh anks with openings ll and are linked into the eyesof the eyebolts, and the flexible connection between the .eyebolt andthe hook and the swivel connection between the latterand thesupporting-bar enable the hook to be readily arranged in any desiredposition to facilitate its engagement with the object to be lifted.

The liftingjack, which possesses great strength and durability, isadapted for a great variety of purposes, as will be readily apparent,and it greatly increases the range and usefulness of an ordinary jack,as it will enable an object to be lifted from the ground by means of thehooks and then operated on by-the jack proper. The object may be raisedby engaging the hooks with it until it is at an elevation which willadmit of the placing of the'jack beneath it. The object is held in thisposition until it is suitably propped or supported, after which thehooks are removed from their engaging positions and the screwis'positioned beneath the object. The jack may then be operated to liftthe object to any desired height within its capacity.

It will be seen that the attachment is eX- ceedingly simple andinexpensive in construction, that it possesses great strength anddurability, and that it may be readily applied to the screw of anordinary jack. It wllalso be apparentthat the connections between thehooks and the ends of the supporting-bar admit of the hooks beingreversed and arranged in any desired position and that as the weight isreceived at points at opposite sides of the jack the latter will notupset.

What I claim isl. The combination with a jack having a screw provided atthe top with a pivot, of a horizontal bar supported on the screw andprovided witha central opening receiving the pivot, whereby the bar isjournaled on the screw and is adapted to swing freely around the same,said bar being provided at its ends with apertures, the eyes providedwith Shanks extending through the apertures at the ends of the bar andsWiveled to the latter, and the opposite hooks provided with openingsand linked into the eyes, substantially as described.

2. The combination with a jack having a screw provided at the top with apivot, a horizontal bar supported bythe screw and provided with anopening to receive the pivot and having apertures at its ends, the eyeslocated beneath the horizontal bar and provided With vertical shankspassing through the said apertures and adapted to turn freely thereinand provided with threads, the nuts engaging the threaded shanks andarranged at the upper face of the horizontal bar, and the hooks havingopenings and linked into the said eyes, whereby they are exiblyconnected Wit-h the horizontal bar, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

JOHN THOMAS SANDERS.

Witnesses:

W. S. MCAFEE, THOs. W. BROOK.

